Seattle weather in January
Seattle in January averages 6°C (42°F) and 147 mm of rain.
Of the twelve months in Seattle, January is the second coldest and the second wettest.
- Average temp
- 6°C (42°F)
3–8°C · 37–47°F
- Rainfall
- 147 mm
Showers likely
- Sunshine
- —
- Wind
- 13 km/h
What is Seattle like in January?
Daytime
Days are cool.
Rain
Some rain is likely; pack for showers.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Seattle in January?
A light rain jacket
About 147 mm falls this month — showers rather than washouts.
A warm mid-layer
Nights drop to around 3°C (37°F).
January compared with December and February
January in Seattle is 0.5°C warmer than December and about as wet as it, which averages 5°C (41°F).
January in Seattle is 0.6°C cooler than February and 51 mm wetter than it, which averages 6°C (43°F).
Daylight in Seattle in January
On 15 January the sun is up for 8 hours 52 minutes in Seattle, rising about 07:53 and setting about 16:44 local time.
January ends 1 hour longer than it begins, so the last week of the month is a different length of day from the first.
That is 7 hours 6 minutes short of June, the longest-lit month here.
Where to stay in Seattle
Dates are a starting point for January.
Travel guides for Seattle
What to read before you book.
Seattle weather by month
TemperatureRainfall
How January compares with the rest of the year
January is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 6°C / 42°F | 147 mm |
| February | 6°C / 43°F | 96 mm |
| March | 8°C / 46°F | 106 mm |
| April | 10°C / 51°F | 81 mm |
| May | 14°C / 57°F | 48 mm |
| June | 16°C / 62°F | 37 mm |
| July | 19°C / 67°F | 15 mm |
| August | 19°C / 67°F | 25 mm |
| September | 17°C / 62°F | 41 mm |
| October | 12°C / 53°F | 99 mm |
| November | 8°C / 46°F | 160 mm |
| December | 5°C / 41°F | 147 mm |
Similar weather in January
Other destinations whose January averages sit close to this one.
Check another month
This is the month you are reading. Change either side to look at another.
FAQs about Seattle in January
January climate averages for Seattle, 1991–2020.
Seattle averages 6°C (42°F) in January, ranging from about 3°C (37°F) at night to 8°C (47°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Some. About 147 mm falls across January, enough to need a light jacket but not enough to reshape a trip.
No. January averages 6°C (42°F) against 6°C (43°F) in February — 0.6°C cooler.
January is 0.5°C warmer than December, and about as wet.
It is outside the easiest window. The most comfortable stretch here is May to October; January sits outside it, which usually means more heat, more rain, or both — worth it if you would rather have the place to yourself.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what January is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 8 hours 52 minutes of daylight in mid-January, against 15 hours 58 minutes in June and 8 hours 27 minutes in December.
On 15 January, sunrise is about 07:53 and sunset about 16:44 local time. Both shift across the month — the month ends 1 hour longer than it starts.
